Sounds like your hooked like the rest of us. Before you spend hundreds of dollars you might want to check into getting a 75 reef ready tank so you don't have to deal with an overflow. Plus a 75 gallon gives much more space for liverock and corals and covers you for the near future before you go crazy and move up to a 200 or larger. Also you can usually pick up a 75 reef ready fairly cheap and you can set up your sump, plumbing, skimmer, and lighting before moving everything over from your 55.